Windows destroyed grub. Timeshift to the rescue?

Manjaro and Windows usually get along well in my notebook. Unless I restore a Windows partition backup and windows boot loader overwrites grub.

Now I’m wondering how to restore grub and, if I remember it right, I’ve got /boot and /boot/efi backed-up in Timeshift as well.

Question: considering the Manjaro partition is still alive and well, if I just restore the contents from the Timeshift backup, will things get back to normal?

If not, what are the correct steps?

There are some good results searching the old forum: